Putnam Variable Trust 12 | 31 | 15 Annual report Putnam VT Equity Income Fund Message from the Trustees Dear Shareholder: As 2016 gets under way, a number of factors in today’s markets stand out. Last year, the U.S. Federal Reserve announced a liftoff in short-term interest rates. The first increase took place in December, but the Fed has said that future hikes will likely occur at a gradual pace. Meanwhile, central banks in Europe and Japan continue to run accommodative monetary policies. China’s economy, the world’s second largest, is slowing, with global ramifications. In addition, the price of a barrel of oil is testing multi-year lows. This combination of factors tempered the performance of stocks in 2015 after a string of solid annual gains over the previous three years. Should the economy continue to grow, stocks could rise, but it would be prudent to be prepared for bouts of volatility in the months ahead. Managing downside risk while pursuing returns in today’s investing environment poses a challenge. Putnam’s experienced portfolio managers are constantly seeking innovative ways to maneuver in today’s markets, relying on a proprietary global research framework to guide their investment ­decisions. The interview on the following pages provides an overview of your fund’s performance for the reporting period ended December 31, 2015, as well as an outlook for the coming months. We also encourage you to consult your financial advisor to ensure that your portfolio is in line with your investment goals, time horizon, and risk tolerance. As always, thank you for investing with Putnam. Respectfully yours, Robert L. Reynolds President and Chief Executive Officer Putnam Investments Jameson A. Baxter Chair, Board of Trustees February 10, 2016 Performance summary (as of 12/31/15) Investment objective Portfolio composition Capital growth and current income 3.4% Telecommunication services 4.7% Utilities 4.8% Materials Net asset value December 31, 2015 Class IA: $21.73 Class IB: $21.55 8.3% Energy 8.6% Consumer staples Total return at net asset value (as of 12/31/15)* 1 year Class IA shares† Class IB shares† –2.79% Russell 1000 Value Index –3.04% –3.83% 5 years 77.96 75.88 70.58 Annualized 12.22 11.95 11.27 118.43 113.30 81.74 10 years Annualized Life Annualized 8.13 7.87 6.16 214.77 205.23 184.73 9.48 9.21 8.61 For a portion of the periods, the fund had expense limitations, without which returns would have been lower. 9.0% Consumer discretionary 11.2% Industrials 2.7% Cash and net other assets 23.0% Financials 12.2% Information technology 12.1% Health care Allocations are shown as a percentage of the fund’s net assets. Cash and net other assets, if any, represent the market value weights of cash, derivatives, short-term securities, and other unclassified assets in the portfolio. Equity Income Fund Summary 23N information may differ from the portfolio schedule included in the financial statements due to the inclusion of derivative securities, any interest accruals, the exclusion of as-of trades, if any, and the use of different classifications of securities for presentation purposes. Holdings and allocations may vary over time. *Recent performance may have benefited from one or more legal settlements. † Class inception date: May 1, 2003. Cumulative total returns of a $10,000 investment in class IA and class IB shares at net asset value — since 12/31/05 $30,000 $25,000 Putnam VT Equity Income Fund class IA shares Putnam VT Equity Income Fund class IB shares Russell 1000 Value Index $21,843 $21,330 $20,000 $18,174 $15,000 $10,000 $5,000 12/31/05 2006 2007 2008 2009 2010 2011 2012 2013 2014 12/31/15 The Russell 1000 Value Index is an unmanaged index of those companies in the large-cap Russell 1000 Index chosen for their value orientation. Data represent past performance. Past performance does not guarantee future results. More recent returns may be less or more than those shown. Investment return and principal value will fluctuate, and you may have a gain or a loss when you sell your shares. Performance information does not reflect any deduction for taxes a shareholder may owe on fund distributions or on the redemption of fund shares. All total return figures are at net asset value and exclude contract charges and expenses, which are added to the variable annuity contracts to determine total return at unit value. Had these charges and expenses been reflected, performance would have been lower. For more recent performance, contact your variable annuity provider who can provide you with performance that reflects the charges and expenses at your contract level. Putnam VT Equity Income Fund 1 Report from your fund’s manager Darren, could you tell us about the investing environment for the 12-month reporting period ended December 31, 2015? U.S. stocks delivered modest returns, and market conditions changed considerably over the course of the period. When the fiscal year began in January 2015, the market was choppy, but stocks, as measured by the S&P 500 Index, managed to post gains overall. In March, the bull market for U.S. stocks marked its sixth anniversary, and at the close of June, stocks posted their tenth consecutive quarterly gain. In my view, the biggest surprise in the first half of 2015 was the lack of significant market volatility. Stock performance was relatively flat and markets were calm, despite several issues, including collapsing oil prices, a strengthening U.S. dollar, and a weaker outlook for earnings growth for U.S. businesses. The calm came to a sudden halt in August, when stocks plunged, and for the first time since 2011, major U.S. stock indexes experienced a correction, defined as a decline of 10% or more after an upward trend. While stocks recovered from their August lows, 2015 was the weakest year for stock market returns since the global financial crisis in 2008. What are some examples of stocks or strategies that contributed to the portfolio’s performance during the reporting period? The top contributor to performance for the period was the portfolio’s investment in Northrop Grumman, an aerospace and defense company. In our view, this was a very well-managed company that focuses on cash flow, profitability, and returning cash to shareholders. Northrop Grumman has delivered strong earnings growth and was recently awarded a multi-billion-dollar Pentagon contract — a pleasant surprise for investors that boosted the stock price considerably. The portfolio’s investment in Alphabet, formerly known as Google, was also a notable contributor to performance for the period. In October, the company reported solid earnings and revenue growth that exceeded expectations. In addition, investors responded positively to the company’s reorganization, which was announced in August 2015. Under the new structure, Google, the search engine portion of the business, will be managed separately from the company’s other businesses. What were some stocks that detracted from performance during the reporting period? Across world financial markets throughout the period, a dominant theme was the sharp decline and continued volatility in oil prices. This was clearly reflected in the performance of Royal Dutch Shell and Marathon Oil, large integrated energy companies whose profitability is closely tied to the price of oil. In addition to selling off assets and cutting capital expenditures, Marathon Oil reduced its dividend — sooner and by a larger amount than investors anticipated. This caused a significant price decline in the stock, which was the top detractor from fund performance for the period. Outside of the energy sector, Genworth Financial was a disappointment. The stock of this insurance and investment 2 Putnam VT Equity Income Fund services company declined in large part because of write-downs in Genworth’s long-term-care business. The problems have been mostly from unprofitable older long-term-care policies. We believe Genworth is taking positive steps, such as raising premiums and working to make its newer long-term-care products more profitable. What are some of the biggest risks for U.S. equities as we head into 2016? Equity markets around the world are faced with an array of macroeconomic risks. Investor worries continue to escalate over slowing growth in China, which is a carefully watched market and a significant global consumer. At the same time, oil price volatility appears to remain a critical challenge for financial markets and businesses. After plunging rapidly in 2014, oil prices remained volatile in 2015, declining to a six-year low last summer, and have continued to decline in early 2016. As a value investor and portfolio manager, however, I am more focused on stock-specific risks such as valuation and earnings. I believe equities are generally expensive today, trading at historically high valuations. This makes it challenging to find opportunities, particularly with a value-style investing approach. Another risk facing equities relates to earnings growth. Profits for S&P 500 companies declined year-over-year in the second and third quarters of 2015. This lack of earnings growth, combined with relatively high valuations, are the biggest challenges for equity investors today, in my view. The views expressed in this report are exclusively those of Putnam Management and are subject to change. They are not meant as investment advice. Please note that the holdings discussed in this report may not have been held by the fund for the entire period. Portfolio composition is subject to review in accordance with the fund’s investment strategy and may vary in the future. Consider these risks before investing: Value stocks may fail to rebound, and the market may not favor value-style investing. Income provided by the fund may be reduced by changes in the dividend policies of, and the capital resources available at, the companies in which the fund invests. Stock prices may fall or fail to rise over time for several reasons, including general financial market conditions and factors related to a specific company or industry. You can lose money by investing in the fund. Your fund’s managers Portfolio Manager Darren A. Jaroch, CFA, joined Putnam in 1999 and has been in the investment industry since 1996. Assistant Portfolio Manager Walter D. Scully, CPA, has been in the investment industry since he joined Putnam in 1996. Your fund’s managers may also manage other accounts advised by Putnam Management or an affiliate, including retail mutual fund counterparts to the funds in Putnam Variable Trust. Understanding your fund’s expenses As an investor in a variable annuity product that invests in a registered investment company, you pay ongoing expenses, such as management fees, distribution fees (12b-1 fees), and other expenses. Using the following information, you can estimate how these expenses affect your investment and compare them with the expenses of other funds. You may also pay one-time transaction expenses, which are not shown in this section and would result in higher total expenses. Charges and expenses at the insurance company separate account level are not reflected. For more information, see your fund’s prospectus or talk to your financial representative. Expense ratios Review your fund’s expenses The two left-hand columns of the Expenses per $1,000 table show the expenses you would have paid on a $1,000 investment in your fund from 7/1/15 to 12/31/15. They also show how much a $1,000 investment would be worth at the close of the period, assuming actual returns and expenses. To estimate the ongoing expenses you paid over the period, divide your account value by $1,000, then multiply the result by the number in the first line for the class of shares you own. *Restated to reflect current fees. Compare your fund’s expenses with those of other funds The two right-hand columns of the Expenses per $1,000 table show your fund’s expenses based on a $1,000 investment, assuming a hypothetical 5% annualized return. You can use this information to compare the ongoing expenses (but not transaction expenses or total costs) of investing in the fund with those of other funds. All shareholder reports of mutual funds and funds serving as variable annuity vehicles will provide this information to help you make this comparison. Please note that you cannot use this information to estimate your actual ending account balance and expenses paid during the period. Class IA Class IB Total annual operating expenses for the fiscal year ended 12/31/14* 0.58% 0.83% Annualized expense ratio for the six-month period ended 12/31/15† 0.58% 0.83% Fiscal-year expense information in this table is taken from the most recent prospectus, is subject to change, and may differ from that shown for the annualized expense ratio and in the financial highlights of this report. Expenses are shown as a percentage of average net assets. †For the fund’s most recent fiscal half year; may differ from expense ratios based on one-year data in the financial highlights. Expenses per $1,000 Expenses and value for a $1,000 investment, assuming actual returns for the 6 months ended 12/31/15 Expenses paid per $1,000*† Ending value (after expenses) Expenses and value for a $1,000 investment, assuming a hypothetical 5% annualized return for the 6 months ended 12/31/15 Class IA Class IB Class IA Class IB $2.86 $4.09 $2.96 $4.23 $956.80 $955.70 $1,022.28 $1,021.02 *Expenses for each share class are calculated using the fund’s annualized expense ratio for each class, which represents the ongoing expenses as a percentage of average net assets for the six months ended December 31, 2015. The expense ratio may differ for each share class. †Expenses based on actual returns are calculated by multiplying the expense ratio by the average account value for the period; then multiplying the result by the number of days in the period; and then dividing that result by the number of days in the year. Expenses based on a hypothetical 5% return are calculated by multiplying the expense ratio by the average account value for the six-month period; then multiplying the result by the number of days in the six-month period; and then dividing that result by the number of days in the year. Putnam VT Equity Income Fund 3 Report of Independent Registered Public Accounting Firm To the Trustees of Putnam Variable Trust and Shareholders of Putnam VT Equity Income Fund: In our opinion, the accompanying statement of assets and liabilities, including the portfolio, and the related statements of operations and of changes in net assets and the financial highlights present fairly, in all material respects, the financial position of Putnam VT Equity Income Fund (the “fund”) at December 31, 2015, and the results of its operations, the changes in its net assets and the financial highlights for each of the periods indicated, in conformity with accounting principles generally accepted in the United States of America. These financial statements and financial highlights (hereafter referred to as “financial statements”) are the responsibility of the fund’s management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits of these financial statements in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. We believe that our audits, which included confirmation of investments owned at December 31, 2015 by correspondence with the custodian, brokers, and transfer agent, provide a reasonable basis for our opinion. PricewaterhouseCoopers LLP Boston, Massachusetts February 10, 2016 4 Putnam VT Equity Income Fund The fund’s portfolio 12/31/15 COMMON STOCKS (95.4%)* COMMON STOCKS (95.4%)* cont. Shares Value Aerospace and defense (6.5%) General Dynamics Corp. 28,270$3,883,167 Honeywell International, Inc. 49,8505,162,965 L-3 Communications Holdings, Inc. 48,2105,761,577 Northrop Grumman Corp. 72,34013,658,513 United Technologies Corp. 21,0202,019,391 30,485,613 Airlines (1.0%) American Airlines Group, Inc. 105,6004,472,160 4,472,160 Auto components (1.1%) Delphi Automotive PLC (United Kingdom) 62,2005,332,406 ðÿ5,332,406 Automobiles (0.8%) General Motors Co. 107,0603,641,111 3,641,111 Banks (9.0%) Bank of America Corp. 408,8906,881,619 Citigroup, Inc. 188,8759,774,281 JPMorgan Chase & Co. 163,19010,775,436 KeyCorp 174,9702,307,854 Regions Financial Corp. 346,2203,323,712 Wells Fargo & Co. 174,6429,493,539 42,556,441 Beverages (1.7%) Coca-Cola Enterprises, Inc. 79,4103,910,148 Dr. Pepper Snapple Group, Inc. 44,9104,185,612 8,095,760 Capital markets (4.3%) Charles Schwab Corp. (The) 175,5605,781,191 Goldman Sachs Group, Inc. (The) 17,1203,085,538 Invesco, Ltd. 59,1201,979,338 KKR & Co. LP 211,2403,293,232 State Street Corp. 90,5806,010,889 20,150,188 Chemicals (2.6%) Air Products & Chemicals, Inc. 30,2103,930,623 CF Industries Holdings, Inc. 30,7801,256,132 Dow Chemical Co. (The) 70,7503,642,210 E.I. du Pont de Nemours & Co. 49,4703,294,702 12,123,667 Commercial services and supplies (0.7%) Tyco International PLC 105,1253,352,436 3,352,436 Communications equipment (1.3%) Cisco Systems, Inc. 134,2203,644,744 QUALCOMM, Inc. 46,6102,329,801 5,974,545 Consumer finance (—%) Oportun Financial Corp. (acquired 6/23/15, cost $223,215) (Private) † ∆∆ F 78,321200,893 200,893 Containers and packaging (1.7%) Packaging Corp. of America 44,3902,798,790 Sealed Air Corp. S 67,4803,009,608 WestRock Co. 49,2182,245,325 8,053,723 Diversified financial services (0.5%) CME Group, Inc. 23,9102,166,246 2,166,246 SharesValue Diversified telecommunication services (2.6%) AT&T, Inc. 122,030$4,199,052 CenturyLink, Inc. 57,8001,454,248 Verizon Communications, Inc. 138,7506,413,025 12,066,325 Electric utilities (3.2%) American Electric Power Co., Inc. 44,3002,581,361 Edison International 51,7403,063,525 Exelon Corp. 132,4203,677,303 NextEra Energy, Inc. 27,1702,822,691 PPL Corp. 87,7282,994,157 15,139,037 Energy equipment and services (1.1%) Baker Hughes, Inc. 61,4302,834,995 Halliburton Co. 29,9501,019,498 National Oilwell Varco, Inc. S 37,4101,252,861 5,107,354 Food and staples retail (1.5%) CVS Health Corp. 70,1906,862,476 6,862,476 Food products (1.2%) JM Smucker Co. (The) 29,7353,667,515 Kraft Heinz Co. (The) 26,2901,912,860 5,580,375 Health-care equipment and supplies (1.7%) Boston Scientific Corp. † 252,5404,656,838 Medtronic PLC 46,1763,551,858 8,208,696 Health-care providers and services (1.6%) Cigna Corp. 51,3107,508,192 7,508,192 Hotels, restaurants, and leisure (0.8%) Hilton Worldwide Holdings, Inc. 171,4373,668,752 3,668,752 Household durables (0.4%) PulteGroup, Inc. 93,5501,667,061 1,667,061 Household products (0.6%) Kimberly-Clark Corp. 23,2602,960,998 2,960,998 Independent power and renewable electricity producers (0.8%) Calpine Corp. † 162,3482,349,176 NRG Energy, Inc. 125,8301,481,019 3,830,195 Industrial conglomerates (1.6%) Danaher Corp. 42,0803,908,390 General Electric Co. 123,7603,855,124 7,763,514 Insurance (4.3%) American International Group, Inc. 100,7406,242,858 Assured Guaranty, Ltd. 131,2403,468,673 Genworth Financial, Inc. Class A † 307,6801,147,646 Hartford Financial Services Group, Inc. (The) 80,2003,485,492 MetLife, Inc. 92,1204,441,105 Willis Group Holdings PLC 31,6601,537,726 20,323,500 Internet software and services (1.5%) Alphabet, Inc. Class C † 9,1956,977,902 6,977,902 IT Services (1.2%) Computer Sciences Corp. S 54,0201,765,374 CSRA, Inc. † 54,0201,620,600 Fidelity National Information Services, Inc. 38,7702,349,462 5,735,436 Putnam VT Equity Income Fund 5 COMMON STOCKS (95.4%)* cont. SharesValue Life sciences tools and services (0.7%) Agilent Technologies, Inc. 83,790$3,503,260 3,503,260 Machinery (0.4%) Oshkosh Corp. 53,0202,069,901 2,069,901 Media (4.8%) CBS Corp. Class B (non-voting shares) 54,3302,560,573 Comcast Corp. Class A 148,4808,378,726 Liberty Global PLC Ser. C (United Kingdom) † 66,5102,711,613 Time Warner Cable, Inc. 23,2904,322,391 Time Warner, Inc. 68,7804,448,003 22,421,306 Multi-utilities (0.7%) Ameren Corp. 19,880859,412 PG&E Corp. 46,8402,491,420 3,350,832 Oil, gas, and consumable fuels (7.2%) Anadarko Petroleum Corp. 68,7703,340,847 EOG Resources, Inc. 33,0702,341,025 Exxon Mobil Corp. 124,2009,681,390 Marathon Oil Corp. 331,3704,171,948 QEP Resources, Inc. 84,6601,134,444 Royal Dutch Shell PLC ADR Class A (United Kingdom) 117,6035,385,041 Total SA (France) 65,1402,901,065 Total SA ADR (France) 10450 Valero Energy Corp. 69,4204,908,688 33,864,898 Personal products (2.3%) Coty, Inc. Class A 279,6107,166,404 Edgewell Personal Care Co. 46,1003,612,857 10,779,261 Pharmaceuticals (7.8%) AstraZeneca PLC ADR (United Kingdom) 172,9205,870,634 Eli Lilly & Co. 155,03013,062,828 Johnson & Johnson 92,7409,526,253 Merck & Co., Inc. 84,8004,479,136 Pfizer, Inc. 116,8893,773,177 36,712,028 Real estate investment trusts (REITs) (3.4%) American Tower Corp. R 22,1402,146,473 Boston Properties, Inc. R S 29,6403,780,286 Equity Lifestyle Properties, Inc. R 56,7603,784,189 Federal Realty Investment Trust R 14,9202,179,812 Gaming and Leisure Properties, Inc. R 60,1701,672,726 MFA Financial, Inc. R 391,4712,583,709 16,147,195 Road and rail (0.7%) Union Pacific Corp. 43,8303,427,506 3,427,506 Semiconductors and semiconductor equipment (2.7%) Intel Corp. 153,9605,303,922 NXP Semiconductor NV † 46,4403,912,570 Texas Instruments, Inc. 62,8803,446,453 12,662,945 Software (3.0%) Microsoft Corp. 230,31012,777,599 Symantec Corp. 65,3001,371,300 14,148,899 Specialty retail (0.9%) Gap, Inc. (The) S 81,170उ2,004,899 Tiffany & Co. S 28,4502,170,451 4,175,350 6 Putnam VT Equity Income Fund COMMON STOCKS (95.4%)* cont. SharesValue Technology hardware, storage, and peripherals (2.6%) Apple, Inc. 56,230$5,918,770 EMC Corp. 156,1204,009,162 SanDisk Corp. 27,5562,093,980 12,021,912 Textiles, apparel, and luxury goods (0.3%) Michael Kors Holdings, Ltd. † 37,4701,501,048 1,501,048 Thrifts and mortgage finance (0.6%) Radian Group, Inc. 210,8522,823,308 2,823,308 Tobacco (1.3%) Philip Morris International, Inc. 71,3506,272,379 6,272,379 Wireless telecommunication services (0.7%) Vodafone Group PLC ADR (United Kingdom) 102,9773,322,038 3,322,038 Total common stocks (cost $372,751,533)$449,209,068 CONVERTIBLE PREFERRED STOCKS (1.3%)* Shares Value Alcoa, Inc. Ser. 1, $2.688 cv. pfd. S 67,083$2,234,702 Allergan PLC Ser. A, 5.50% cv. pfd. 1,0901,122,896 American Tower Corp. $5.50 cv. pfd. R 10,2251,029,530 ArcelorMittal SA Ser. MTUS, $1.50 cv. pfd. (France) 14,17191,669 Frontier Communications Corp. Ser. A, $11.125 cum. cv. pfd. 5,089462,145 Oportun Financial Corp. Ser. A-1, 8.00% cv. pfd. (acquired 6/23/15, cost $610) (Private) † ∆∆ F 214549 Oportun Financial Corp. Ser. B-1, 8.00% cv. pfd. (acquired 6/23/15, cost $11,658) (Private) † ∆∆ F 3,70110,492 Oportun Financial Corp. Ser. C-1, 8.00% cv. pfd. (acquired 6/23/15, cost $27,379) (Private) † ∆∆ F 5,37924,641 Oportun Financial Corp. Ser. D-1, 8.00% cv. pfd. (acquired 6/23/15, cost $39,712) (Private) † ∆∆ F 7,80235,741 Oportun Financial Corp. Ser. E-1, 8.00% cv. pfd. (acquired 6/23/15, cost $22,267) (Private) † ∆∆ F 4,05620,041 Oportun Financial Corp. Ser. F, 8.00% cv. pfd. (acquired 6/23/15, cost $67,223) (Private) † ∆∆ F 8,75360,501 Oportun Financial Corp. Ser. F-1, 8.00% cv. pfd. (acquired 6/23/15, cost $188,556) (Private) † ∆∆ F 66,160169,700 Oportun Financial Corp. Ser. G, 8.00% cv. pfd. (acquired 6/23/15, cost $238,428) (Private) † ∆∆ F 83,659214,585 Oportun Financial Corp. Ser. H, 8.00% cv. pfd. (acquired 2/6/15, cost $732,781) (Private) † ∆∆ F 257,360659,503 Total convertible preferred stocks (cost $7,658,439)$6,136,695 CONVERTIBLE BONDS AND NOTES (0.6%)* Principal amount Value MGIC Investment Corp. cv. sr. unsec. notes 5s, 2017 $1,768,000$1,818,830 WESCO International, Inc. cv. company guaranty sr. unsec. notes 6s, 2029 624,000968,760 Total convertible bonds and notes (cost $2,530,611)$2,787,590 SHORT-TERM INVESTMENTS (4.8%) Shares Value Putnam Cash Collateral Pool, LLC 0.44% d 10,137,525$10,137,525 Putnam Short Term Investment Fund 0.33% L 12,519,42812,519,428 Total short-term investments (cost $22,656,953)$22,656,953 Total investments (cost $405,597,536)$480,790,306 Key to holding’s abbreviations ADRAmerican Depository Receipts: represents ownership of foreign securities on deposit with a custodian bank Notes to the fund’s portfolio Unless noted otherwise, the notes to the fund’s portfolio are for the close of the fund’s reporting period, which ran from January 1, 2015 through December 31, 2015 (the reporting period). Within the following notes to the portfolio, references to “ASC 820” represent Accounting Standards Codification 820 Fair Value Measurements and Disclosures and references to “OTC”, if any, represent over-the-counter. F This security is valued at fair value following procedures approved by the Trustees. Securities may be classified as Level 2 or Level 3 for ASC 820 based on the securities’ valuation inputs. At the close of the reporting period, fair value pricing was also used for certain foreign securities in the portfolio (Note 1). L Affiliated company (Note 5). The rate quoted in the security description is the annualized 7-day yield of the fund at the close of the reporting period. * Percentages indicated are based on net assets of $470,659,442. R Real Estate Investment Trust. † This security is non-income-producing. S Security ∆∆ This security is restricted with regard to public resale. The total fair value of this security and any other restricted securities (excluding 144A securities), if any, held at the close of the reporting period was $1,396,646, or 0.3% of net assets. on loan, in part or in entirety, at the close of the reporting period (Note 1). Debt obligations are considered secured unless otherwise indicated. The dates shown on debt obligations are the original maturity dates. d Affiliated company. See Note 1 to the financial statements regarding securi- ties lending. The rate quoted in the security description is the annualized 7-day yield of the fund at the close of the reporting period. ASC 820 establishes a three-level hierarchy for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of the fund’s investments. The three levels are defined as follows: Level 1: Valuations based on quoted prices for identical securities in active markets. Level 2: Valuations based on quoted prices in markets that are not active or for which all significant inputs are observable, either directly or indirectly. Level 3: Valuations based on inputs that are unobservable and significant to the fair value measurement. The following is a summary of the inputs used to value the fund’s net assets as of the close of the reporting period: Valuation inputs Investments in securities: Level 1 Level 2 Level 3 Common stocks*: Consumer discretionary Consumer staples Energy Financials $—­ $—­ 40,551,249 — — 36,071,187 2,901,065 — 104,166,878 — 200,893 Health care 55,932,176 — — Industrials 51,571,130 — — Information technology 57,521,639 — — Materials 20,177,390 — — Telecommunication services 15,388,363 — — Utilities 22,320,064 — — 446,107,110 2,901,065 200,893 — 2,787,590 — 1,195,753 Total common stocks Convertible bonds and notes Convertible preferred stocks Short-term investments Totals by level $42,407,034 — 4,940,942 12,519,428 10,137,525 — $458,626,538 $20,767,122 $1,396,646 *Common stock classifications are presented at the sector level, which may differ from the fund’s portfolio presentation. During the reporting period, transfers within the fair value hierarchy, if any, (other than certain transfers involving non-U.S. equity securities as described in Note 1­) did not represent, in the aggregate, more than 1% of the fund’s net assets measured as of the end of the period. Transfers are accounted for using the end of period pricing valuation method. At the start and close of the reporting period, Level 3 investments in securities represented less than 1% of the fund’s net assets and were not considered a significant portion of the fund’s portfolio. The accompanying notes are an integral part of these financial statements. Putnam VT Equity Income Fund 7 Statement of assets and liabilities 12/31/15 Assets Investment in securities, at value, including $9,806,150 of securities on loan (Note 1): Unaffiliated issuers (identified cost $382,940,583) Affiliated issuers (identified cost $22,656,953) (Notes 1 and 5) Dividends, interest and other receivables Receivable for shares of the fund sold Total assets $458,133,353 22,656,953 1,032,717 213,971 482,036,994 Liabilities Payable for shares of the fund repurchased Payable for compensation of Manager (Note 2) Payable for custodian fees (Note 2) Payable for investor servicing fees (Note 2) Payable for Trustee compensation and expenses (Note 2) Payable for administrative services (Note 2) Payable for distribution fees (Note 2) Collateral on securities loaned, at value (Note 1) 676,658 190,587 6,321 53,161 172,610 3,624 62,218 10,137,525 Other accrued expenses Total liabilities 74,848 11,377,552 Net assets $470,659,442 Represented by Paid-in capital (Unlimited shares authorized) (Notes 1 and 4) Undistributed net investment income (Note 1) Accumulated net realized gain on investments and foreign currency transactions (Note 1) Net unrealized appreciation of investments and assets and liabilities in foreign currencies Total — Representing net assets applicable to capital shares outstanding $379,315,313 8,987,079 7,164,292 75,192,758 $470,659,442 Computation of net asset value Class IA Net assets Number of shares outstanding Net asset value, offering price and redemption price per share (net assets divided by number of shares outstanding) $180,031,697 8,283,419 $21.73 Computation of net asset value Class IB Net assets Number of shares outstanding Net asset value, offering price and redemption price per share (net assets divided by number of shares outstanding) The accompanying notes are an integral part of these financial statements. 8 Putnam VT Equity Income Fund $290,627,745 13,483,155 $21.55 Statement of operations Year ended 12/31/15 Investment income Dividends (net of foreign tax of $83,319) Interest (including interest income of $15,035 from investments in affiliated issuers) (Note 5) Securities lending (Note 1) Total investment income $12,741,109 111,987 87,307 12,940,403 Expenses Compensation of Manager (Note 2) Investor servicing fees (Note 2) Custodian fees (Note 2) Trustee compensation and expenses (Note 2) Distribution fees (Note 2) Administrative services (Note 2) Other Total expenses 2,289,016 341,939 15,437 30,220 732,009 12,927 138,290 3,559,838 Expense reduction (Note 2) Net expenses (11,101) 3,548,737 Net investment income 9,391,666 Net realized gain on investments (Notes 1 and 3) Net realized gain on foreign currency transactions (Note 1) Net unrealized depreciation of assets and liabilities in foreign currencies during the year Net unrealized depreciation of investments during the year Net loss on investments 28,796,842 1,483 (12) (52,171,764) (23,373,451) Net decrease in net assets resulting from operations $(13,981,785) Statement of changes in net assets Year ended 12/31/15 Year ended 12/31/14 Increase (decrease) in net assets Operations: Net investment income $9,391,666 $7,943,068 Net realized gain on investments and foreign currency transactions 28,798,325 59,200,526 Net unrealized depreciation of investments and assets and liabilities in foreign currencies (52,171,776) (9,590,539) Net increase (decrease) in net assets resulting from operations (13,981,785) 57,553,055 Class IA (3,676,383) (3,959,537) Class IB (4,623,024) (4,695,039) 1,446,310 (28,313,940) (20,834,882) 20,584,539 Distributions to shareholders (Note 1): From ordinary income Net investment income Increase (decrease) from capital share transactions (Note 4) Total increase (decrease) in net assets Net assets: Beginning of year End of year (including undistributed net investment income of $8,987,079 and $7,961,044, respectively) 491,494,324 470,909,785 $470,659,442 $491,494,324 The accompanying notes are an integral part of these financial statements. Putnam VT Equity Income Fund 9 Financial highlights (For a common share outstanding throughout the period) LESS DISTRIBUTIONS: Net realized and unrealized gain (loss) on investments­ Total from investment operations­ From net investment income­ Total dis­tri­bu­tions­ Net asset value, end of period­ Net assets, end of period (in thousands­) Ratio of expenses to average net assets (%­)b,d Ratio of net investment income (loss) to average net assets (%­) Portfolio turnover (%­) 12/31/15­ $22.76­ .46 (1.07­) (.61­) (.42­) (.42­) $21.73­ (2.79­) $180,032­ .58­ 2.06 22­ 12/31/14­ 20.55­ .39­ 2.23­ 2.62­ (.41­) (.41­) 22.76­ 12.97­ 202,797­ .61­ 1.81­ 31­ 37­ Period ended­ Total return at net asset value (%­)b,c Net investment income (loss­)a RATIOS AND SUPPLEMENTAL DATA: Net asset value, beginning of period­ INVESTMENT OPERATIONS: Class IA­ 12/31/13­ 15.83­ .39­ 4.72­ 5.11­ (.39­) (.39­) 20.55­ 32.72­ 204,742­ .63­ 2.12­ 12/31/12­ 13.56­ .37­ 2.27­ 2.64­ (.37­) (.37­) 15.83­ 19.62­ 181,642­ .64­ 2.50­ 51­ 12/31/11­ 13.54­ .34­ (.04­) .30­ (.28­) (.28­) 13.56­ 2.07­ 175,723­ .64­ 2.48­ 66­ 22­ Class IB­ 12/31/15­ $22.58­ .41­ (1.08­) (.67­) (.36­) (.36­) $21.55­ (3.04­) $290,628­ .83­ 1.83 12/31/14­ 20.40­ .33­ 2.21­ 2.54­ (.36­) (.36­) 22.58­ 12.66­ 288,698­ .86­ 1.56­ 31­ 12/31/13­ 15.72­ .34­ 4.69­ 5.03­ (.35­) (.35­) 20.40­ 32.41­ 266,168­ .88­ 1.87­ 37­ 12/31/12­ 13.47­ .33­ 2.25­ 2.58­ (.33­) (.33­) 15.72­ 19.30­ 205,628­ .89­ 2.25­ 51­ 12/31/11­ 13.44­ .30­ (.03­) .27­ (.24­) (.24­) 13.47­ 1.92­ 181,456­ .89­ 2.23­ 66­ a Per share net investment income (loss) has been determined on the basis of the weighted average number of shares outstanding during the period. b The charges and expenses at the insurance company separate account level are not reflected. c Total return assumes dividend reinvestment. d Includes amounts paid through expense offset and/or brokerage/service arrangements, if any (Note 2). Also excludes acquired fund fees and expenses, if any. The accompanying notes are an integral part of these financial statements. 10 Putnam VT Equity Income Fund Notes to financial statements 12/31/15 Within the following Notes to financial statements, references to “State Street” represent State Street Bank and Trust Company, references to “the SEC” represent the Securities and Exchange Commission, references to “Putnam Management” represent Putnam Investment Management, LLC, the fund’s manager, an indirect wholly-owned subsidiary of Putnam Investments, LLC and references to “OTC”, if any, represent over-the-counter. Unless otherwise noted, the “reporting period” represents the period from January 1, 2015 through December 31, 2015. Putnam VT Equity Income Fund (the fund) is a diversified series of Putnam Variable Trust (the Trust), a Massachusetts business trust registered under the Investment Company Act of 1940, as amended, as an open-end management investment company. The goal of the fund is to seek capital growth and current income. The fund invests mainly in common stocks of midsize and large U.S. companies, with a focus on value stocks that offer the potential for capital growth, current income, or both. Value stocks are issued by companies that Putnam Management believes are currently undervalued by the market. If Putnam Management is correct and other investors ultimately recognize the value of the company, the price of its stock may rise. Putnam Management may consider, among other factors, a company’s valuation, financial strength, growth potential, competitive position in its industry, projected future earnings, cash flows and dividends when deciding whether to buy or sell investments. The fund offers class IA and class IB shares of beneficial interest. Class IA shares are offered at net asset value and are not subject to a distribution fee. Class IB shares are offered at net asset value and pay an ongoing distribution fee, which is identified in Note 2. In the normal course of business, the fund enters into contracts that may include agreements to indemnify another party under given circumstances. The fund’s maximum exposure under these arrangements is unknown as this would involve future claims that may be, but have not yet been, made against the fund. However, the fund’s management team expects the risk of material loss to be remote. Note 1 — Significant accounting policies The following is a summary of significant accounting policies consistently followed by the fund in the preparation of its financial statements. The preparation of financial statements is in conformity with accounting principles generally accepted in the United States of America and requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities in the financial statements and the reported amounts of increases and decreases in net assets from operations. Actual results could differ from those estimates. Subsequent events after the Statement of assets and liabilities date through the date that the financial statements were issued have been evaluated in the preparation of the financial statements. Investment income, realized and unrealized gains and losses and expenses of the fund are borne pro-rata based on the relative net assets of each class to the total net assets of the fund, except that each class bears expenses unique to that class (including the distribution fees applicable to such classes). Each class votes as a class only with respect to its own distribution plan or other matters on which a class vote is required by law or determined by the Trustees. If the fund were liquidated, shares of each class would receive their pro-rata share of the net assets of the fund. In addition, the Trustees declare separate dividends on each class of shares. Security valuation Portfolio securities and other investments are valued using policies and procedures adopted by the Board of Trustees. The Trustees have formed a Pricing Committee to oversee the implementation of these procedures and have delegated responsibility for valuing the fund’s assets in accordance with these procedures to Putnam Management. Putnam Management has established an internal Valuation Committee that is responsible for making fair value determinations, evaluating the effectiveness of the pricing policies of the fund and reporting to the Pricing Committee. Investments for which market quotations are readily available are valued at the last reported sales price on their principal exchange, or official closing price for certain markets, and are classified as Level 1 securities under Accounting Standards Codification 820 Fair Value Measurements and Disclosures (ASC 820). If no sales are reported, as in the case of some securities that are traded OTC, a security is valued at its last reported bid price and is generally categorized as a Level 2 security. Investments in open-end investment companies (excluding exchange-traded funds), if any, which can be classified as Level 1 or Level 2 securities, are valued based on their net asset value. The net asset value of such investment companies equals the total value of their assets less their liabilities and divided by the number of their outstanding shares. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange and therefore the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. Accordingly, on certain days, the fund will fair value foreign equity securities taking into account multiple factors including movements in the U.S. securities markets, currency valuations and comparisons to the valuation of American Depository Receipts, exchange-traded funds and futures contracts. These securities, which would generally be classified as Level 1 securities, will be transferred to Level 2 of the fair value hierarchy when they are valued at fair value. The number of days on which fair value prices will be used will depend on market activity and it is possible that fair value prices will be used by the fund to a significant extent. At the close of the reporting period, fair value pricing was used for certain foreign securities in the portfolio. Securities quoted in foreign currencies, if any, are translated into U.S. dollars at the current exchange rate. Short-term securities with remaining maturities of 60 days or less may be valued at amortized cost, which approximates fair value, and are classified as Level 2 securities. To the extent a pricing service or dealer is unable to value a security or provides a valuation that Putnam Management does not believe accurately reflects the security’s fair value, the security will be valued at fair value by Putnam Management in accordance with policies and procedures approved by the Trustees. Certain investments, including certain restricted and illiquid securities and derivatives, are also valued at fair value following procedures approved by the Trustees. These valuations consider such factors as significant market or specific security events such as interest rate or credit quality changes, various relationships with other securities, discount rates, U.S. Treasury, U.S. swap and credit yields, index levels, convexity exposures, recovery rates, sales and other multiples and resale restrictions. These securities are classified as Level 2 or as Level 3 depending on the priority of the significant inputs. To assess the continuing appropriateness of fair valuations, the Valuation Committee reviews and affirms the reasonableness of such valuations on a regular basis after considering all relevant information that is reasonably available. Such valuations and procedures are reviewed periodically by the Trustees. The fair value of securities is generally determined as the amount that the fund could reasonably expect to realize from an orderly disposition of such securities over a reasonable period of time. By its nature, a fair value price is a good faith estimate of the value of a security in a current sale and does not reflect an actual market price, which may be different by a material amount. Security transactions and related investment income Security transactions are recorded on the trade date (the date the order to buy or sell is executed). Gains or losses on securities sold are determined on the identified cost basis. Interest income, net of any applicable withholding taxes, is recorded on the accrual basis. Dividend income, net of any applicable withholding taxes, is recognized on the ex-dividend date except that certain dividends from foreign securities, if any, are recognized as soon as the fund is informed of the ex-dividend date. Non-cash dividends, if any, are recorded at the fair value of the securities received. Dividends representing a return of capital or capital gains, if any, are reflected as a reduction of cost and/or as a realized gain. All premiums/discounts are amortized/accreted on a yield-to-maturity basis. Foreign currency translation The accounting records of the fund are maintained in U.S. dollars. The fair value of foreign securities, currency holdings, and other assets and liabilities is recorded in the books and records of the fund after translation to U.S. dollars based on the exchange rates on that day. The cost of each security is determined using historical exchange rates. Income and withholding taxes are translated at prevailing exchange rates when earned or incurred. The fund does not isolate that portion of realized or unrealized gains or losses resulting from changes in the foreign exchange rate on investments from fluctuations arising from changes in the market prices of the securities. Such gains and losses are included with the net realized and unrealized gain or loss on investments. Net realized gains and losses on foreign currency transactions represent net realized exchange gains or losses on closed forward Putnam VT Equity Income Fund 11 currency contracts, disposition of foreign currencies, currency gains and losses realized between the trade and settlement dates on securities transactions and the difference between the amount of investment income and foreign withholding taxes recorded on the fund’s books and the U.S. dollar equivalent amounts actually received or paid. Net unrealized appreciation and depreciation of assets and liabilities in foreign currencies arise from changes in the value of open forward currency contracts and assets and liabilities other than investments at the period end, resulting from changes in the exchange rate. Securities lending The fund may lend securities, through its agent, to qualified borrowers in order to earn additional income. The loans are collateralized by cash in an amount at least equal to the fair value of the securities loaned. The fair value of securities loaned is determined daily and any additional required collateral is allocated to the fund on the next business day. The remaining maturities of the securities lending transactions are considered overnight and continuous. The risk of borrower default will be borne by the fund’s agent; the fund will bear the risk of loss with respect to the investment of the cash collateral. Income from securities lending is included in investment income on the Statement of operations. Cash collateral is invested in Putnam Cash Collateral Pool, LLC, a limited liability company managed by an affiliate of Putnam Management. Investments in Putnam Cash Collateral Pool, LLC are valued at its closing net asset value each business day. There are no management fees charged to Putnam Cash Collateral Pool, LLC. At the close of the reporting period, the fund received cash collateral of $10,137,525 and the value of securities loaned amounted to $9,806,150. Interfund lending The fund, along with other Putnam funds, may participate in an interfund lending program pursuant to an exemptive order issued by the SEC. This program allows the fund to borrow from or lend to other Putnam funds that permit such transactions. Interfund lending transactions are subject to each fund’s investment policies and borrowing and lending limits. Interest earned or paid on the interfund lending transaction will be based on the average of certain current market rates. During the reporting period, the fund did not utilize the program. Lines of credit The fund participates, along with other Putnam funds, in a $392.5 million syndicated unsecured committed line of credit provided by State Street ($292.5 million) and Northern Trust Company ($100 million) and a $235.5 million unsecured uncommitted line of credit provided by State Street. Borrowings may be made for temporary or emergency purposes, including the funding of shareholder redemption requests and trade settlements. Interest is charged to the fund based on the fund’s borrowing at a rate equal to the higher of (1) the Federal Funds rate and (2) the overnight LIBOR plus 1.25% for the committed line of credit and the Federal Funds rate plus 1.30% for the uncommitted line of credit. A closing fee equal to 0.04% of the committed line of credit and 0.04% of the uncommitted line of credit has been paid by the participating funds. In addition, a commitment fee of 0.16% per annum on any unutilized portion of the committed line of credit is allocated to the participating funds based on their relative net assets and paid quarterly. During the reporting period, the fund had no borrowings against these arrangements. Federal taxes It is the policy of the fund to distribute all of its taxable income within the prescribed time period and otherwise comply with the provisions of the Internal Revenue Code of 1986, as amended (the Code), applicable to regulated investment companies. The fund is subject to the provisions of Accounting Standards Codification 740 Income Taxes (ASC 740). ASC 740 sets forth a minimum threshold for financial statement recognition of the benefit of a tax position taken or expected to be taken in a tax return. The fund did not have a liability to record for any unrecognized tax benefits in the accompanying financial statements. No provision has been made for federal taxes on income, capital gains or unrealized appreciation on securities held nor for excise tax on income and capital gains. Each of the fund’s federal tax returns for the prior three fiscal years remains subject to examination by the Internal Revenue Service. The fund may also be subject to taxes imposed by governments of countries in which it invests. Such taxes are generally based on either income or gains earned or repatriated. The fund accrues and applies such taxes to net investment income, net realized gains and net unrealized gains as income and/or capital gains are earned. In some cases, the fund may be entitled to reclaim all or a portion of such taxes, and such reclaim amounts, if any, are reflected as an asset on the fund’s books. In many cases, however, the fund may not receive such amounts for an extended period of time, depending on the country of investment. 12 Putnam VT Equity Income Fund Distributions to shareholders Distributions to shareholders from net investment income are recorded by the fund on the ex-dividend date. Distributions from capital gains, if any, are recorded on the ex-dividend date and paid at least annually. The amount and character of income and gains to be distributed are determined in accordance with income tax regulations, which may differ from generally accepted accounting principles. These differences include temporary and/or permanent differences from losses on wash sale transactions and nontaxable dividends. Reclassifications are made to the fund’s capital accounts to reflect income and gains available for distribution (or available capital loss carryovers) under income tax regulations. At the close of the reporting period, the fund reclassified $66,224 to decrease undistributed net investment income, $13 to decrease paid-in capital and $66,237 to increase accumulated net realized gain. The tax basis components of distributable earnings and the federal tax cost as of the close of the reporting period were as follows: Unrealized appreciation$109,476,543 Unrealized depreciation(35,251,914) Net unrealized appreciation74,224,629 Undistributed ordinary income8,987,079 Undistributed long-term gain8,132,434 Cost for federal income tax purposes$406,565,677 Expenses of the Trust Expenses directly charged or attributable to any fund will be paid from the assets of that fund. Generally, expenses of the Trust will be allocated among and charged to the assets of each fund on a basis that the Trustees deem fair and equitable, which may be based on the relative assets of each fund or the nature of the services performed and relative applicability to each fund. Beneficial interest At the close of the reporting period, insurance companies or their separate accounts were record owners of all but a de minimis number of the shares of the fund. Approximately 25.9% of the fund is owned by accounts of one insurance company. Note 2 — Management fee, administrative services and other transactions The fund pays Putnam Management a management fee (based on the fund’s average net assets and computed and paid monthly) at annual rates that may vary based on the average of the aggregate net assets of most open-end funds, as defined in the fund’s management contract, sponsored by Putnam Management. Such annual rates may vary as follows: 0.630% of the first $5 billion, 0.580% of the next $5 billion, 0.530% of the next $10 billion, 0.480% of the next $10 billion, 0.430% of the next $50 billion, 0.410% of the next $50 billion, 0.400% of the next $100 billion and 0.395% of any excess thereafter. Putnam Management has contractually agreed, through April 30, 2017, to waive fees or reimburse the fund’s expenses to the extent necessary to limit the cumulative expenses of the fund, exclusive of brokerage, interest, taxes, investment-related expenses, extraordinary expenses, acquired fund fees and expenses and payments under the fund’s investor servicing contract, investment management contract and distribution plans, on a fiscal year-to-date basis to an annual rate of 0.20% of the fund’s average net assets over such fiscal year-to-date period. During the reporting period, the fund’s expenses were not reduced as a result of this limit. Putnam Investments Limited (PIL), an affiliate of Putnam Management, is authorized by the Trustees to manage a separate portion of the assets of the fund as determined by Putnam Management from time to time. Putnam Management pays a quarterly sub-management fee to PIL for its services at an annual rate of 0.35% of the average net assets of the portion of the fund managed by PIL. The fund reimburses Putnam Management an allocated amount for the compensation and related expenses of certain officers of the fund and their staff who provide administrative services to the fund. The aggregate amount of all such reimbursements is determined annually by the Trustees. Custodial functions for the fund’s assets are provided by State Street. Custody fees are based on the fund’s asset level, the number of its security holdings and transaction volumes. Putnam Investor Services, Inc., an affiliate of Putnam Management, provides investor servicing agent functions to the fund. Putnam Investor Services, Inc. was paid a monthly fee for investor servicing at an annual rate of 0.07% (0.10% prior to January 1, 2015) of the fund’s average daily net assets. During the reporting period, the expenses for each class of shares related to investor servicing fees were as follows: expenses in the Statement of operations. Accrued pension liability is included in Payable for Trustee compensation and expenses in the Statement of assets and liabilities. The Trustees have terminated the Pension Plan with respect to any Trustee first elected after 2003. The fund has adopted a distribution plan (the Plan) with respect to its class IB shares pursuant to Rule 12b-1 under the Investment Company Act of 1940. The purpose of the Plan is to compensate Putnam Retail Management Limited Partnership, an indirect wholly-owned subsidiary of Putnam Investments, LLC, for services provided and expenses incurred in distributing shares of the fund. The Plan provides for payment by the fund to Putnam Retail Management Limited Partnership at an annual rate of up to 0.35% of the average net assets attributable to the fund’s class IB shares. The Trustees have approved payment by the fund at an annual rate of 0.25% of the average net assets attributable to the fund’s class IB shares. During the reporting period, the class specific expenses related to distribution fees were as follows: Class IA$137,001 Class IB204,938 Total$341,939 The fund has entered into expense offset arrangements with Putnam Investor Services, Inc. and State Street whereby Putnam Investor Services, Inc.’s and State Street’s fees are reduced by credits allowed on cash balances. The fund also reduced expenses through brokerage/service arrangements. For the reporting period, the fund’s expenses were not reduced under the expense offset arrangements and were reduced by $11,101 under the brokerage/ service arrangements. Class IB$732,009 Each Independent Trustee of the fund receives an annual Trustee fee, of which $292, as a quarterly retainer, has been allocated to the fund, and an additional fee for each Trustees meeting attended. Trustees also are reimbursed for expenses they incur relating to their services as Trustees. Note 3 — Purchases and sales of securities During the reporting period, the cost of purchases and the proceeds from sales, excluding short-term investments, were as follows: The fund has adopted a Trustee Fee Deferral Plan (the Deferral Plan) which allows the Trustees to defer the receipt of all or a portion of Trustees fees payable on or after July 1, 1995. The deferred fees remain invested in certain Putnam funds until distribution in accordance with the Deferral Plan. Investments in securities (Long-term) Cost of purchases Proceeds from sales $110,771,837 $105,216,429 U.S. government securities (Long-term) Total The fund has adopted an unfunded noncontributory defined benefit pension plan (the Pension Plan) covering all Trustees of the fund who have served as a Trustee for at least five years and were first elected prior to 2004. Benefits under the Pension Plan are equal to 50% of the Trustee’s average annual attendance and retainer fees for the three years ended December 31, 2005. The retirement benefit is payable during a Trustee’s lifetime, beginning the year following retirement, for the number of years of service through December 31, 2006. Pension expense for the fund is included in Trustee compensation and — — $110,771,837 $105,216,429 The fund may purchase or sell investments from or to other Putnam funds in the ordinary course of business, which can reduce the fund’s transaction costs, at prices determined in accordance with SEC requirements and policies approved by the Trustees. During the reporting period, purchases or sales from or to other Putnam funds, if any, did not represent more than 5% of the fund’s total cost of purchases and/or total proceeds from sales. Note 4— Capital shares At the close of the reporting period, there were an unlimited number of shares of beneficial interest authorized. Subscriptions and redemptions are presented at the omnibus level. Transactions in capital shares were as follows: Class IA shares Year ended 12/31/15 Class IB shares Year ended 12/31/14 Year ended 12/31/15 Year ended 12/31/14 Shares Amount Shares Amount Shares Amount Shares Amount Shares sold 537,636 $12,062,886 545,730 $11,751,528 2,377,351 $52,943,696 2,204,556 $46,842,986 Shares issued in connection with reinvestment of distributions 150,748 3,441,583 190,932 3,921,747 203,837 4,623,024 230,036 4,695,039 688,384 15,504,469 736,662 15,673,275 2,581,188 57,566,720 2,434,592 51,538,025 (38,304,081) (1,883,705) (42,065,422) (2,698,514) (57,221,159) (263,922) $(5,683,134) Shares repurchased (1,314,787) Net increase (decrease) (29,559,457) (626,403) $(14,054,988) (1,789,023) (1,052,361) $(22,630,806) 697,483 $15,501,298 Note 5 — Affiliated transactions Transactions during the reporting period with Putnam Short Term Investment Fund, which is under common ownership and control, were as follows: Name of affiliate Fair value at the beginning of the reporting period Purchase cost Sale proceeds Investment income Fair value at the end of the reporting period Putnam Short Term Investment Fund* $12,734,327 $80,660,896 $80,875,795 $15,035 $12,519,428 Totals $12,734,327 $80,660,896 $80,875,795 $15,035 $12,519,428 * Management fees charged to Putnam Short Term Investment Fund have been waived by Putnam Management. Note 6 — Market, credit and other risks In the normal course of business, the fund trades financial instruments and enters into financial transactions where risk of potential loss exists due to changes in the market (market risk) or failure of the contracting party to the transaction to perform (credit risk). The fund may be exposed to additional credit risk that an institution or other entity with which the fund has unsettled or open transactions will default. Investments in foreign securities involve certain risks, including those related to economic instability, unfavorable political developments, and currency fluctuations. Putnam VT Equity Income Fund 13 Federal tax information (Unaudited) Pursuant to §852 of the Internal Revenue Code, as amended, the fund hereby designates $8,945,677 as a capital gain dividend with respect to the taxable year ended December 31, 2015, or, if subsequently determined to be different, the net capital gain of such year. The fund designated 97.51% of ordinary income distributions as qualifying for the dividends received deduction for corporations. 14 Putnam VT Equity Income Fund About the Trustees Name Year of birth Position held Principal occupations during past five years Other directorships Independent Trustees Liaquat Ahamed Born 1952 Trustee since 2012 Pulitzer Prize-winning author of Lords of Finance: The Bankers Who Broke the World, whose articles on economics have appeared in such publications as the New York Times, Foreign Affairs, and the Financial Times. Director of Aspen Insurance Co., a New York Stock Exchange company, and Chair of the Aspen Board’s Investment Committee. Trustee of the Brookings Institution. The Rohatyn Group, an emerging-market fund complex that manages money for institutions Ravi Akhoury Born 1947 Trustee since 2009 Trustee of American India Foundation and of the Rubin Museum. From 1992 to 2007, was Chairman and CEO of MacKay Shields, a multi-product investment management firm. RAGE Frameworks, Inc., a private software company; English Helper, Inc., a private software company Barbara M. Baumann Born 1955 Trustee since 2010 President and Owner of Cross Creek Energy Corporation, a strategic consultant to domestic energy firms and direct investor in energy projects. Current Board member of The Denver Foundation. Former Chair and current Board member of Girls Incorporated of Metro Denver. Member of the Finance Committee, the Children’s Hospital of Colorado. Buckeye Partners, L.P., a publicly traded master limited partnership focused on pipeline transport, storage, and distribution of petroleum products; Devon Energy Corporation, a leading independent natural gas and oil exploration and production company Jameson A. Baxter Born 1943 Trustee since 1994, Vice Chair from 2005 to 2011, and Chair since 2011 President of Baxter Associates, Inc., a private investment firm. Chair of Mutual Fund Directors Forum. Chair Emeritus of the Board of Trustees of Mount Holyoke College. Director of the Adirondack Land Trust and Trustee of the Nature Conservancy’s Adirondack Chapter. None Robert J. Darretta Born 1946 Trustee since 2007 From 2009 until 2012, served as Health Care Industry Advisor to Permira, a global private equity firm. Until April 2007, was Vice Chairman of the Board of Directors of Johnson & Johnson. Served as Johnson & Johnson’s Chief Financial Officer for a decade. UnitedHealth Group, a diversified health-care company Katinka Domotorffy Born 1975 Trustee since 2012 Voting member of the Investment Committees of the Anne Ray Charitable Trust and Margaret A. Cargill Foundation, part of the Margaret A. Cargill Philanthropies. Until 2011, Partner, Chief Investment Officer, and Global Head of Quantitative Investment Strategies at Goldman Sachs Asset Management. Reach Out and Read of Greater New York, an organization dedicated to promoting childhood literacy; Great Lakes Science Center John A. Hill Born 1942 Trustee since 1985 and Chairman from 2000 to 2011 Founder and Vice-Chairman of First Reserve Corporation, the leading private equity buyout firm focused on the worldwide energy industry. Trustee and Chairman of the Board of Trustees of Sarah Lawrence College. Member of the Advisory Board of the Millstein Center for Global Markets and Corporate Ownership at The Columbia University Law School. Devon Energy Corporation, a leading independent natural gas and oil exploration and production company Paul L. Joskow Born 1947 Trustee since 1997 Economist and President of the Alfred P. Sloan Foundation, a philanthropic institution focused primarily on research and education on issues related to science, technology, and economic performance. Elizabeth and James Killian Professor of Economics, Emeritus at the Massachusetts Institute of Technology (MIT). Prior to 2007, served as the Director of the Center for Energy and Environmental Policy Research at MIT. Yale University; Exelon Corporation, an energy company focused on power services; Boston Symphony Orchestra; Prior to April 2013, served as Director of TransCanada Corporation and TransCanada Pipelines Ltd., energy companies focused on natural gas transmission, oil pipelines and power services Kenneth R. Leibler Born 1949 Trustee since 2006 Founder and former Chairman of Boston Options Exchange, an electronic marketplace for the trading of derivative securities. Serves on the Board of Trustees of Beth Israel Deaconess Hospital in Boston, Massachusetts. Director of Beth Israel Deaconess Care Organization. Until November 2010, director of Ruder Finn Group, a global communications and advertising firm. Eversource Corporation, which operates New England’s largest energy delivery system Putnam VT Equity Income Fund 15 Name Year of birth Position held Principal occupations during past five years Other directorships Robert E. Patterson Born 1945 Trustee since 1984 Co-Chairman of Cabot Properties, Inc., a private equity firm investing in commercial real estate; and Chairman of its Investment Committee. Past Chairman and Trustee of the Joslin Diabetes Center. None George Putnam, III Born 1951 Trustee since 1984 Chairman of New Generation Research, Inc., a publisher of financial advisory and other research services. Founder and President of New Generation Advisors, LLC, a registered investment advisor to private funds. Director of The Boston Family Office, LLC, a registered investment advisor. None W. Thomas Stephens Born 1942 Trustee from 1997 to 2008 and since 2009 Retired as Chairman and Chief Executive Officer of Boise Cascade, LLC, a paper, forest products, and timberland assets company, in December 2008. Prior to 2010, Director of Boise Inc., a manufacturer of paper and packaging products. Prior to April 2014, served as Director of TransCanada Pipelines Ltd., an energy infrastructure company President and Chief Executive Officer of Putnam Investments since 2008 and, since 2014, President and Chief Executive Officer of Great‑West Financial, a financial services company that provides retirement savings plans, life insurance, and annuity and executive benefits products, and of Great‑West Lifeco U.S. Inc., a holding company that owns Putnam Investments and Great-West Financial. Prior to joining Putnam Investments, served as Vice Chairman and Chief Operating Officer of Fidelity Investments from 2000 to 2007. None Interested Trustee Robert L. Reynolds* Born 1952 Trustee since 2008 and President of the Putnam Funds since 2009 *Mr. Reynolds is an “interested person” (as defined in the Investment Company Act of 1940) of the fund and Putnam Investments. He is President and Chief Executive Officer of Putnam Investments, as well as the President of your fund and each of the other Putnam funds. The address of each Trustee is One Post Office Square, Boston, MA 02109. As of December 31, 2015, there were 117 Putnam funds. All Trustees serve as Trustees of all Putnam funds. Each Trustee serves for an indefinite term, until his or her resignation, retirement at age 75, removal, or death. Officers In addition to Robert L. Reynolds, the other officers of the fund are shown below: Jonathan S. Horwitz (Born 1955) Executive Vice President, Principal Executive Officer, and Compliance Liaison Since 2004 Steven D. Krichmar (Born 1958) Vice President and Principal Financial Officer Since 2002 Chief of Operations, Putnam Investments and Putnam Management Robert T. Burns (Born 1961) Vice President and Chief Legal Officer Since 2011 General Counsel, Putnam Investments, Putnam Management, and Putnam Retail Management James F. Clark (Born 1974) Chief Compliance Officer Since 2016 Associate General Counsel, Putnam Investments, Putnam Investment Management, and Putnam Retail Management (2003–2015) Michael J. Higgins (Born 1976) Vice President, Treasurer, and Clerk Since 2010 Manager of Finance, Dunkin’ Brands (2008–2010); Senior Financial Analyst, Old Mutual Asset Management (2007–2008); Senior Financial Analyst, Putnam Investments (1999–2007) Janet C. Smith (Born 1965) Vice President, Principal Accounting Officer, and Assistant Treasurer Since 2007 Director of Fund Administration Services, Putnam Investments and Putnam Management Susan G. Malloy (Born 1957) Vice President and Assistant Treasurer Since 2007 Director of Accounting & Control Services, Putnam Investments and Putnam Management James P. Pappas (Born 1953) Vice President Since 2004 Director of Trustee Relations, Putnam Investments and Putnam Management Mark C. Trenchard (Born 1962) Vice President and BSA Compliance Officer Since 2002 Director of Operational Compliance, Putnam Investments and Putnam Retail Management Nancy E. Florek (Born 1957) Vice President, Director of Proxy Voting and Corporate Governance, Assistant Clerk, and Associate Treasurer Since 2000 The principal occupations of the officers for the past five years have been with the employers as shown above, although in some cases they have held different positions with such employers. The address of each officer is One Post Office Square, Boston, MA 02109. 16 Putnam VT Equity Income Fund Other important information Proxy voting Putnam is committed to managing our mutual funds in the best interests of our shareholders. The Putnam funds’ proxy voting guidelines and procedures, as well as information regarding how your fund voted proxies relating to portfolio ­securities during the 12-month period ended June 30, 2015, are available in the Individual Investors section of putnam.com and on the Securities and Exchange Commission’s [SEC] website, www.sec.gov. If you have q ­ uestions about finding forms on the SEC’s website, you may call the SEC at 1-800-SEC-0330. You may also obtain the Putnam funds’ proxy voting g ­ uidelines and procedures at no charge by calling Putnam’s Shareholder Services at 1-800-225-1581. Fund portfolio holdings Each Putnam VT fund will file a complete schedule of its portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-Q. Shareholders may obtain the fund’s Form N-Q on the SEC’s website at www.sec.gov. In addition, the fund’s Form N-Q may be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. You may call the SEC at 1-800-SEC-0330 for information about the SEC’s website or the operation of the Public Reference Room. Fund information Investment Manager Putnam Investment Management, LLC One Post Office Square Boston, MA 02109 Investment Sub-Manager Putnam Investments Limited 57–59 St James’s Street London, England SW1A 1LD Marketing Services Putnam Retail Management One Post Office Square Boston, MA 02109 Investor Servicing Agent Putnam Investor Services, Inc. Mailing address: P.O. Box 8383 Boston, MA 02266-8383 1-800-225-1581 Custodian State Street Bank and Trust Company Legal Counsel Ropes & Gray LLP Independent Registered Public Accounting Firm PricewaterhouseCoopers LLP Trustees Jameson A. Baxter, Chair Liaquat Ahamed Ravi Akhoury Barbara M. Baumann Robert J. Darretta Katinka Domotorffy John A. Hill Paul L. Joskow Kenneth R. Leibler Robert E. Patterson George Putnam, III Robert L. Reynolds W. Thomas Stephens The fund’s Statement of Additional Information contains additional information about the fund’s Trustees and is available without charge upon request by calling 1-800-225-1581. Putnam VT Equity Income Fund 17 This report has been prepared for the shareholders of Putnam VT Equity Income Fund. H503 VTAN020 298642 2/16